Thursday, October 20, 2016

Update as of 10/20

Over the past week, I downloaded a 2011 land cover raster from USGS online. I observed the attributes table of this raster and found out that each land cover type corresponded to both an integral value and the amount of pixels within the raster it is associated with. I also delineated the Patroon Watershed by using the USGS StreamStats website to identify the area in which it encapsulates and exporting that area as a shapefile into ArcGIS.  My initial plan was to convert the land cover raster into a polygon vector by using the model tool so that I can calculate land use percentages within this watershed. When I tried doing this, I realized the raster is too large for such a conversion. Then, I tried clipping it, but ArcGIS was still giving me a hard time. I will either have to find a smaller raster or figure out a different method to do the conversion.


After delineating the Patroon watershed and observing the land cover within the watershed, I am realizing that the watershed land cover consists entirely of low to high intensity urban development. I have more of a fixed range of land use types to work with than I thought. Therefore, I can not use any of the natural land areas for my project like I initially planned.

Goals for next week:
-Convert the raster into a polygon vector
-Find the area of the polygon, which will represent the area of the Patroon watershed



2 comments:

  1. This sounds like great work! I had a similar issue when I attempted to convert my land use raster into polygon form. Supposedly the Siena arcGIS account needed to be reactivated last week and after it was reactivated I tried once again and was successfully. Hopefully everything works out well for you but I think you are making good progress. Keep the hard work up!

    --Ian R

    ReplyDelete
  2. This sounds like great work! I had a similar issue when I attempted to convert my land use raster into polygon form. Supposedly the Siena arcGIS account needed to be reactivated last week and after it was reactivated I tried once again and was successfully. Hopefully everything works out well for you but I think you are making good progress. Keep the hard work up!

    --Ian R

    ReplyDelete